A designed experiment is described. Identify the specified element of the experiment.
-A herpetologist performed a study on the effects of the body type and mating call of the male bullfrog as signals of quality to mates. Four life-sized dummies of male bullfrogs and two sound Recordings provided a tool for testing female response to the unfamiliar frogs whose bodies varied By size (large or small)and color (dark or light)and whose mating calls varied by pitch (high, Normal, or low). The female bullfrogs were observed to see whether they approached each of the Four life-sized dummies. Identify the experimental units.
A)The scientist
B)The female bullfrogs
C)The male bullfrogs
D)All of the frogs, male and female

Question

A designed experiment is described. Identify the specified element of the experiment.
-A herpetologist performed a study on the effects of the body type and mating call of the male bullfrog as signals of quality to mates. Four life-sized dummies of male bullfrogs and two sound Recordings provided a tool for testing female response to the unfamiliar frogs whose bodies varied By size (large or small)and color (dark or light)and whose mating calls varied by pitch (high, Normal, or low). The female bullfrogs were observed to see whether they approached each of the Four life-sized dummies. Identify the experimental units. 
A)The scientist
B)The female bullfrogs
C)The male bullfrogs
D)All of the frogs, male and female

Quizplus · Accepted Answer

The experimental units are the entities that are subjected to the experimental conditions and are observed for the effects. In this case, the female bullfrogs are the ones being tested for their response to the dummies and sound recordings, making them the experimental units.

A Designed Experiment Is Described